Canon Oce PlotWave 300 Administration Manual page 288

Troubleshooting: Disable 'Access control' and IPsec (Océ ColorWave 650/550 systems)
2. Select 'Setup'
3. Roll down to 'Disable access control'
Enter the password if requested (Password to change the network settings).
4. Confirm to disable access control
5. Press 'Finish'
6. Restart the controller
Result
Access control is disabled.
If IPsec was also activated on the controller, it is also disabled with this operation.
288 Chapter 5 - Security on Océ ColorWave 550/600/650 (and Poster Printer)